Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.3.0 release notes (AA-RWF9H-TE, June 2009)

Configuring QLogic HBA parameters
To configure the QLogic HBA parameters for QLogic 2xxx family of HBAs, complete the following
steps:
1. Edit the /etc/modprobe.conf file in RHEL hosts and /etc/modprobe.conf.local file in
SLES hosts with the following values:
• For operating systems using the native Qlogic drivers,
options qla2xxx ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretry-
count=30
• For other operating systems using the HP Qlogic drivers,
options qla2xxx ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretry-
count=30 ql2xfailover=0 ql2xlbType=1 ql2xautorestore=0xa0 ConfigRe-
quired=0
2. Rebuild the initrd by executing the following commands:
• For operating systems using the native Qlogic drivers, complete the following steps:
a. Backup the existing initrd image by executing the following command:
#mv /boot/initrd-<version no.>.img /boot/initrd-<version
no.>.img.old
b. Make a new initrd image by executing the following command:
• For SLES 11: mkinitrd -k <kernal> —i <initrd>
• For other operating systems: #mkinitrd /boot/initrd-<version no.>.img
`uname -r`
c. Edit the value for default parameter in /boot/grub/menu.lst file to boot with the
new initrd image.
• For other operating systems using the HP Qlogic drivers,
/opt/hp/src/hp_qla2x00src/make_initrd
3. Reboot the host.
Configuring Emulex HBA parameters
To configure the Emulex HBA parameters, complete the following steps:
1. For Emulex lpfc family of HBAs:
• In RHEL 4 hosts, edit the /etc/modprobe.conf file with the following values:
options lpfc lpfc_nodev_tmo=14 lpfc_lun_queue_depth=16 lpfc_discovery_threads=32
• In SLES 10/SLES 11 hosts, edit the /etc/modprobe.conf.local file with the following
values:
options lpfc lpfc_nodev_tmo=14 lpfc_lun_queue_depth=16 lpfc_discovery_threads=32
• In RHEL 5 hosts, edit the /etc/modprobe.conf file with the following values:
options lpfc lpfc_nodev_tmo=14 lpfc_lun_queue_depth=16 lpfc_discovery_threads=32
2. Rebuild the initrd by executing the following commands:
• For operating systems using the native Emulex drivers, complete the following steps:
a. Backup the existing initrd image by executing the following command:
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